(Los Angeles, Calif.) -- Over the past three and a half billon years our ancestors have fought for survival and have been forced to make a stark choice: adapt or die. But how did we get here? How did mutations create male and female sexes? And were we actually fish at one point during the evolutionary chain?

"Mankind Rising," airing Sunday, Nov. 25 at 9 PM E/P on Discovery Channel's CURIOSITY series, traces our epic and treacherous journey from the first spark of life that exploded billions of years ago up to humans' present status as the most successful species on the planet.

Based on the latest research, the episode follows the sequence of events that led to life as we know it and pieces together the extraordinary story of our journey in one animated shot. Along the way, countless creatures have died and natural selection has helped our ancestors to adapt and survive. This is the improbable story of human existence - where we've risen from raw materials of Earth to the big-brained, two-legged mammals we are today. One change or predator along the way and this story would have never been told.

"Mankind Rising" is produced by Pioneer Productions for Discovery Channel. CURIOSITY is overseen by Vice President, Development and Production Howard Swartz and Senior Vice President, Development and Production Simon Andreae. To learn more, go to www.discovery.com, on Facebook at Facebook.com/discovery and on Twitter @Discovery. Nissan is a presenting sponsor of "Mankind Rising."

About Discovery Channel

Discovery Channel is dedicated to creating the highest quality non-fiction content that informs and entertains its consumers about the world in all its wonder, diversity and amazement. The network, which is distributed to 100.8 million U.S. homes, can be seen in 210 countries and territories, offering a signature mix of compelling, high-end production values and vivid cinematography across genres including, science and technology, exploration, adventure, history and in-depth, behind-the-scenes glimpses at the people, places and organizations that shape and share our world. For more information, please visit www.discovery.com.

About Discovery Communications

Discovery Communications (Nasdaq: DISCA, DISCB, DISCK) is the world's #1 nonfiction media company reaching more than 1.8 billion cumulative subscribers in 209 countries and territories. Discovery is dedicated to satisfying curiosity through 149 worldwide television networks, led by Discovery Channel, TLC, Animal Planet, Science and Investigation Discovery, as well as U.S. joint venture networks OWN: Oprah Winfrey Network, The Hub and 3net, the first 24-hour 3D network. Discovery also is a leading provider of educational products and services to schools and owns and operates a diversified portfolio of digital media services, including Revision3. For more information, please visit www.discoverycommunications.com.